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| 25ef440 | In living organisms, nucleic acid molecules are the only indefinite hereditary replicators, or at least they were until the invention of language and music. | John Maynard Smith | ||
| d9ea61a | Thus three conclusions emerge from the eye story: (1) it is easier to inherit a 'vision acquisition device' than a full-blown hard-wired visual analyser; (2) the visual analyser, once 'set up', is refractory to radical restructuring--hence the existence of a critical period in its development in cats; (3) the eye seems to have evolved in steps from a light-sensitive, innervated cell to our complex organ by common evolutionary mechanisms. So.. | John Maynard Smith |